Banca de QUALIFICAÇÃO: RAFAELI KEILA SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : RAFAELI KEILA SANTOS
DATE: 18/12/2023
TIME: 19:30
LOCAL: Sala 702, CEFETMG ARAXÁ
TITLE:

EFFECT OF THE GREASY PROFILE OF ANIONIC COLLECTORS ON THE FLOTATION OF APATITE AND CARBONATES

KEY WORDS:

Microflotation. Apatite. Calcite. Dolomite, Oleic e Palmitate

PAGES: 68
BIG AREA: Engenharias
AREA: Engenharia de Minas
SUBÁREA: Tratamento de Minérios
SPECIALTY: Métodos de Concentração e Enriquecimento de Minérios
SUMMARY:

Due to the great demand from the agribusiness sector and the progressive reduction in the levels of deposits discovered and already in mining, researchers have been studying alternative routes and reagents to those used. The concentration of minerals efficiently and selectively can be obtained based on the surface chemical properties of the minerals (hydrophobicity/hydrophilicity) through the flotation operation, enabling the separation of mineral-ore and gangue. The surface properties of mineral species can be modified by the addition of specific reagents, collectors, or modifiers. Different collecting reagents have been studied for the selective separation of apatite from carbonate contaminants (mainly calcite and dolomite) present in phosphate ores. Phosphate rock contains a large amount of carbonates as contaminating minerals. To date, it has not been possible to obtain a route for concentrating this ore on an industrial scale. Selectivity is difficult due to the similarity of the surface chemical composition between phosphates and carbonates, the collectors used to react with the calcium present in the structure of apatite and carbonates. An alternative to improve the selectivity of apatite/carbonate separation is to use efficient reagents. Within this context, studying the effects of different proportions of fatty acids can be a possible alternative in the selective flotation of carbonates and apatite. Therefore, this work aims to evaluate the effect of the proportion of fatty acids on the flotation of apatite and carbonates. Exploratory microflotation studies for apatite and calcite were carried out in a Modified Hallimond Tube study. So far the results have shown that the proportion is the most significant variable for the system.

COMMITTEE MEMBERS:
Presidente - FABIO DE SAO JOSE
Externo ao Programa - FERNANDO BRANDAO RODRIGUES DA SILVA
Externo ao Programa - LEANDRO HENRIQUE SANTOS
Externo à Instituição - FRANCISCO GREGIANIN TESTA